org.jvoicexml.xml.ssml
Class Audio

java.lang.Object
  org.jvoicexml.xml.AbstractXmlNode
      org.jvoicexml.xml.ssml.Audio

All Implemented Interfaces:

SsmlNode, VoiceXmlNode, XmlNode, XmlWritable, Node

public final class Audio
extends AbstractXmlNode
implements VoiceXmlNode

Audio can be played in any prompt. The audio content can be specified via a URI, and in VoiceXML it can also be in an audio variable previously recorded.

<prompt>
Your recorded greeting is
<audio expr="greeting"/> To rerecord, press 1.
To keep it, press pound.
To return to the main menu press star M.
To exit press star, star X.
</prompt>

The <audio> element can have alternate content in case the audio sample is not available:

<prompt>
<audio src="welcome.wav">
<emphasis>Welcome </emphasis> to the Voice Portal.
</audio>
</prompt>

If the audio file cannot be played (e.g. 'src' referencing or 'expr' evaluating to an invalid URI, a file with an unsupported format, etc), the content of the audio element is played instead. The content may include text, speech markup, or another audio element. If the audio file cannot be played and the content of the audio element is empty, no audio is played and no error event is thrown.

If <audio> contains an 'expr' attribute evaluating to ECMAScript undefined, then the element, including its alternate content, is ignored. This allows a developer to specify <audio> elements with dynamically assigned content which, if the element is not required, can be ignored by assigning its 'expr' a null value.

Version:

$Revision: 154 $

Copyright © 2005-2006 JVoiceXML group - http://jvoicexml.sourceforge.net/

Author:

Steve Doyle

See Also:

Form, Prompt

Field Summary

static String	ATTRIBUTE_EXPR An ECMAScript expression which determines the source of the audio to be played.
static String	ATTRIBUTE_FETCHHINT Defines when the interpreter context should retrieve content from the server. prefetch indicates a file may be downloaded when the page is loaded, whereas safe indicates a file that should only be downloaded when actually needed.
static String	ATTRIBUTE_FETCHTIMEOUT The interval to wait for the content to be returned before throwing an error.badfetch event.
static String	ATTRIBUTE_MAXAGE Indicates that the document is willing to use content whose age is no greater than the specified time in seconds.
static String	ATTRIBUTE_MAXSTALE Indicates that the document is willing to use content that has exceeded its expiration time.
protected static ArrayList<String>	ATTRIBUTE_NAMES Supported attribute names for this node.
static String	ATTRIBUTE_SRC The URI of the audio prompt.
static String	TAG_NAME Name of the tag.

Fields inherited from interface org.w3c.dom.Node

ATTRIBUTE_NODE, CDATA_SECTION_NODE, COMMENT_NODE, DOCUMENT_FRAGMENT_NODE, DOCUMENT_NODE, DOCUMENT_POSITION_CONTAINED_BY, DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, DOCUMENT_POSITION_PRECEDING, DOCUMENT_TYPE_NODE, ELEMENT_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE, NOTATION_NODE, PROCESSING_INSTRUCTION_NODE, TEXT_NODE

Constructor Summary

Audio()
Construct a new audio object without a node.

Method Summary

protected boolean	canContainChild(String tagName) Can the specified sub-tag be contained within this node?
Collection<String>	getAttributeNames() Returns a collection of permitted attribute names for the node.
NodeList	getChildNodes() A NodeList that contains all children of this node.
String	getExpr() Retrieve the expr attribute.
String	getFetchhint() Retrieve the fetchhint attribute.
String	getFetchtimeout() Retrieve the fetchtimeout attribute.
String	getMaxage() Retrieve the maxage attribute.
String	getMaxstale() Retrieve the maxstale attribute.
String	getSrc() Retrieve the src attribute.
String	getTagName() Get the name of the tag for the derived node.
XmlNode	newInstance(Node n) Create a new instance for the given node.
void	setExpr(String expr) Set the expr attribute.
void	setFetchhint(String fetchhint) Set the fetchhint attribute.
void	setFetchtimeout(String fetchtimeout) Set the fetchtimeout attribute.
void	setMaxage(String maxage) Set the maxage attribute.
void	setMaxstale(String maxstale) Set the maxstale attribute.
void	setSrc(String src) Set the src attribute.

Methods inherited from class org.jvoicexml.xml.AbstractXmlNode

addChild, addChild, appendChild, cloneNode, compareDocumentPosition, getAttribute, getAttributes, getBaseURI, getChildNodes, getFeature, getFirstChild, getLastChild, getLocalName, getNamespaceURI, getNextSibling, getNode, getNodeFactory, getNodeName, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getTextContent, getUserData, hasAttributes, hasChildNodes, insertBefore, isDefaultNamespace, isEqualNode, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeChild, replaceChild, setAttribute, setNodeValue, setPrefix, setTextContent, setUserData, toString, writeChildrenXml, writeXml

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.jvoicexml.xml.XmlNode

addChild, getAttribute, getChildNodes, getNode, setAttribute

Methods inherited from interface org.jvoicexml.xml.XmlWritable

writeChildrenXml, writeXml

Methods inherited from interface org.w3c.dom.Node

appendChild, cloneNode, compareDocumentPosition, getAttributes, getBaseURI, getChildNodes, getFeature, getFirstChild, getLastChild, getLocalName, getNamespaceURI, getNextSibling, getNodeName, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getTextContent, getUserData, hasAttributes, hasChildNodes, insertBefore, isDefaultNamespace, isEqualNode, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeChild, replaceChild, setNodeValue, setPrefix, setTextContent, setUserData

Field Detail

TAG_NAME

public static final String TAG_NAME

Name of the tag.

See Also:

Constant Field Values

ATTRIBUTE_SRC

public static final String ATTRIBUTE_SRC

The URI of the audio prompt.

See Also:

Constant Field Values

ATTRIBUTE_FETCHTIMEOUT

public static final String ATTRIBUTE_FETCHTIMEOUT

The interval to wait for the content to be returned before throwing an error.badfetch event. This defaults to the fetchtimeout property.

See Also:

Constant Field Values

ATTRIBUTE_FETCHHINT

public static final String ATTRIBUTE_FETCHHINT

Defines when the interpreter context should retrieve content from the server. prefetch indicates a file may be downloaded when the page is loaded, whereas safe indicates a file that should only be downloaded when actually needed. This defaults to the audiofetchhint property.

See Also:

Constant Field Values

ATTRIBUTE_MAXAGE

public static final String ATTRIBUTE_MAXAGE

Indicates that the document is willing to use content whose age is no greater than the specified time in seconds. The document is not willing to use stale content, unless maxstale is also provided. This defaults to the audiomaxage property.

See Also:

Constant Field Values

ATTRIBUTE_MAXSTALE

public static final String ATTRIBUTE_MAXSTALE

Indicates that the document is willing to use content that has exceeded its expiration time. If maxstale is assigned a value, then the document is willing to accept content that has exceeded its expiration time by no more than the specified number of seconds. This defaults to the audiomaxstale property.

See Also:

Constant Field Values

ATTRIBUTE_EXPR

public static final String ATTRIBUTE_EXPR

An ECMAScript expression which determines the source of the audio to be played. The expression may be either a reference to audio previously recorded with the <record/> item or evaluate to the URI of an audio resource to fetch.

See Also:

Constant Field Values

ATTRIBUTE_NAMES

protected static final ArrayList<String> ATTRIBUTE_NAMES

Supported attribute names for this node.

Constructor Detail

Audio

public Audio()

Construct a new audio object without a node.

This is necessary for the node factory.

See Also:

VoiceXmlNodeFactory

Method Detail

getTagName

public String getTagName()

Get the name of the tag for the derived node.

Specified by:

getTagName in interface XmlNode

Returns:

name of the tag.

newInstance

public XmlNode newInstance(Node n)

Create a new instance for the given node.

Each XmlNode can serve as a prototype in a XmlNodeFactory to produce a collection of child nodes. Factories can then use the prototype pattern to produce new nodes.

Specified by:

newInstance in interface XmlNode

Parameters:

n - The node to encapsulate.

Returns:

The new instance.

See Also:

XmlNodeFactory

getSrc

public String getSrc()

Retrieve the src attribute.

Returns:

Value of the src attribute.

See Also:

ATTRIBUTE_SRC

setSrc

public void setSrc(String src)

Set the src attribute.

Parameters:

src - Value of the src attribute.

See Also:

ATTRIBUTE_SRC

getFetchtimeout

public String getFetchtimeout()

Retrieve the fetchtimeout attribute.

Returns:

Value of the fetchtimeout attribute.

See Also:

ATTRIBUTE_FETCHTIMEOUT

setFetchtimeout

public void setFetchtimeout(String fetchtimeout)

Set the fetchtimeout attribute.

Parameters:

fetchtimeout - Value of the fetchtimeout attribute.

See Also:

ATTRIBUTE_FETCHTIMEOUT

getFetchhint

public String getFetchhint()

Retrieve the fetchhint attribute.

Returns:

Value of the fetchhint attribute.

See Also:

ATTRIBUTE_FETCHHINT

setFetchhint

public void setFetchhint(String fetchhint)

Set the fetchhint attribute.

Parameters:

fetchhint - Value of the fetchhint attribute.

See Also:

ATTRIBUTE_FETCHHINT

getMaxage

public String getMaxage()

Retrieve the maxage attribute.

Returns:

Value of the maxage attribute.

See Also:

ATTRIBUTE_MAXAGE

setMaxage

public void setMaxage(String maxage)

Set the maxage attribute.

Parameters:

maxage - Value of the maxage attribute.

See Also:

ATTRIBUTE_MAXAGE

getMaxstale

public String getMaxstale()

Retrieve the maxstale attribute.

Returns:

Value of the maxstale attribute.

See Also:

ATTRIBUTE_MAXSTALE

setMaxstale

public void setMaxstale(String maxstale)

Set the maxstale attribute.

Parameters:

maxstale - Value of the maxstale attribute.

See Also:

ATTRIBUTE_MAXSTALE

getExpr

public String getExpr()

Retrieve the expr attribute.

Returns:

Value of the expr attribute.

See Also:

ATTRIBUTE_EXPR

setExpr

public void setExpr(String expr)

Set the expr attribute.

Parameters:

expr - Value of the expr attribute.

See Also:

ATTRIBUTE_EXPR

canContainChild

protected boolean canContainChild(String tagName)

Can the specified sub-tag be contained within this node?

Specified by:

canContainChild in class AbstractXmlNode

Parameters:

tagName - Name of child.

Returns:

True if the sub-tag is allowed on this node.

getAttributeNames

public Collection<String> getAttributeNames()

Returns a collection of permitted attribute names for the node.

Specified by:

getAttributeNames in interface XmlNode

Overrides:

getAttributeNames in class AbstractXmlNode

Returns:

A collection of attribute names that are allowed for the node

getChildNodes

public final NodeList getChildNodes()

A NodeList that contains all children of this node.

Specified by:

getChildNodes in interface Node

Returns:

NodeList